An … L31 Vortec questions. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. You will be able to find a high-quality plug for the 5.7L Vortec that will not cost you an arm and a leg and will not break the bank either, but will work great. EFI Parts, Supplies, Software and Reviews! Base timing for TBI-HEI with .060 spark plugs, If this is your first visit, be sure to This is primarily attributed to the high port flow in the .300”-.500” valve lift area, wide bowl, and back-cut intake valve and exhaust. I found this list of L31 plug recommendations. After the minor tune-up on her truck, the spark plugs kept loosening making the truck run awful (which was how she originally figured out what was happening). Besides the $12 Denso's what are some good Spark Plugs? Most of Today's Spark plugs are Pre-Gapped right out of the Box,.....The Gap is 0.60 ... And if you are going with factory AC delco plugs which work well in the Vortec motor then absolutely be sure you check. They will be shrouded by about a 1/4". Selecting the most effective Spark Plugs for Chevy 350 Engines. Need info on what Spark Plugs the Factory Calls for on a 1997 Sonoma 4.3 Vortec X code V6. • A new spark plug has been released for use in the above vehicles. Champion Spark Plugs for Marine Power Inboard Motors. V6 Vortec Engine Diagram Spark Plug.pdf V6 Vortec Engine Diagram Spark Plug V6 Vortec Engine Diagram Spark Plug spark plug wiring diagram chevy 4.3 v6 i have the model with the vortec v6. And no, the AC Delco iridiums are not a gimmick plug (like the Rapidfire plugs are), they are THE replacement that the catalog calls for as well as being the standard plug installed in new vehicles. ENGINE CODE: L31 Vortec. Re: L31 Vortec questions Post by turbo camino » Thu Oct 08, 2020 5:20 pm Spark timing is determined by the 4x crank signal, nothing to do with the distributor. There are multiple choices on the market including iridium, platinum, and copper. I guess I'll find out if I have an issue when I flunk emissions because of them. Due to the different tip design, the gap of the spark plug has also changed. Vortec head require different spark plugs than other SBC heads. Fuel Injection Writeups Articles and How to New and Old. The iridium plugs are even tougher. The pn# for the iridium plugs is 41-993. There are a lot of different spark plugs for sale on the market today. Originally, the stock #906 casting head was available in two versions. ratio and cam timing are similar to your 350 Vortec based engine as well. OEM GM spark plugs are made from the best materials for your vehicle. Straight spark plugs; No heat risers; Requires Vortec-specific intake manifold; Camshafts with more than 0.475" lift require machining valve guide bosses and … The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). I just did them on my 1988 and they were gaped at .45.. Just a heads up . Still nothing. It is one of the best spark plugs for 4.3 v6 Vortec engines. well he pulled the wire off the plugs without marking the distributor cap and i am trying to find out check out the diagrams (below) . Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. That is why we are here to help you with our best spark plugs for 4.8 Vortec reviews.So, go through the details thoroughly and make your choice. MAKE: Holden. Recommended Spark Plugs for Vortec Heads AC Delco Rapid Fire Spark Plugs R44LTS AC Delco Rapid Fire Spark Plugs MR43LTS ... in the L31 vortec heads I ran on a '74 11-1, 355CI, .450 lift hyd. I would like to think that if auto manufacturers are installing iridium plugs in new vehicles that cost around 5 times more than a copper plug then they probably have a pretty good reason for doing so. • A new spark plug has been released for use in the above vehicles. Post by travis » Wed Oct 07, ... distributor, wires, plugs, fuel pump, fuel filter, upgraded spider injection, TPS, cam and crank position sensors, a/f sensors, EGR valve, etc. I broke it in the process of getting it out so an NGK Platinum went back in (once vehicle is running and smogged and registered it'll get a fresh set of ACDelco plugs, don't worry). You may also find the Champion spark plug code helpful. ratio and cam timing are similar to your 350 Vortec based engine as well. cam, 1.6 rockers, headers, eddy RPM manifold with a 4777 650 dbl pump 4.10's and a M20. autokwix.com, All Rights Reserved. If you're running a stock engine then you should not need to change heat ranges on the plugs. The exception to that would be some of the early vortec 4.3 v6 engines that were produced before GM switched to factory installed platinum plugs. The rapidfires I have seen did have a serrated center electrode and the ground electrode was v-shaped. I have spark from coil to dist cap but nothing from there to plugs. I have two questions & I'd appreciate your input: 1. heat range for the engine so they would be the same as the r44lts. I have a 350 engine I built myself using factory Vortec heads. 2. L48, 4spd. Also while I was messing with plugs I used an inline spark tester and spark … The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. 98 Votec 7.4L spark plug application. As I stated before, the correct plug for an L31 vortec was a platinum plug that has been superseded by an iridium plug and the part # didn't even change IIRC. But I don't think these are appropriate for the vortec heads. I have a 350 engine I built myself using factory Vortec heads. These are plain $2 spark plugs, not platinum or anything fancy. This engine already has the right heads, plus it uses a hydraulic roller cam. 16196395 vs 16197427 $0D same PCM? I use Autolite 605 spark plugs in it. This engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, SUV's, and van applications. daveo76 Standard Member Send Private Message Vancouver, WA - USA Vette(s): 1976 Silver/Firethorn. The most likely reason for the marine applications running copper plugs is that marine applications do not have to meet the same emissions standards as cars do and they also do not need to run extended tune-up intervals. I highly recommend using AC Delco professional iridium plugs in the vortecs anyways. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. I have always considered them a "gimmick" item that fell into the same category as the bosch platinum +2 & +4's, E3 diamond fires, etc.... Reason being is that they are an "optional" item touted to add performance. lmao. What does the Factory Call For? Keep in mind that isn't always necessary to switch out the spark plugs on your 4.3 Vortec. Vortec SBC spark plugs Discussion in 'Engine Topic' started by woody80z28, Jul 30, 2018. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). 8 IRIDIUM SPARK PLUGS. 2.What is the difference between the R43/LTS & the R43/LTS6? These are what the parts store gave me when I asked for plugs for a 454. New Poll . I have never heard anything good about the rapidfires from a competent tech and there were parts counter guys that I respected that would not sell them at all. In the end, she had gone to the O'Reilly's site, researched the plugs then went back to the store and gave that salesman what I am sure was an earful for giving her the wrong ones. They are the O.E. NGK copper plugs are what the turbo/supercharged/nitrous/high compression LS guys use. Could the timing ha … read more Joined: Sep 8, 2004 Location: walton, ny usa. check out the. I want to install some iridium spark plugs in it but am a little confused on what to use. Search . Not terribly different from your crate engine. Recommended Spark Plugs for Vortec Heads • AC Delco Rapid Fire Spark Plugs R44LTS • AC Delco Rapid Fire Spark Plugs MR43LTS • AC Delco RapidFire No 3 Sparkplug • ACCEL P526S U-Groove “SHORTY†Double Platinum (approximately 3/16″ shorter then R44LTS) Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. They are probably equivalent to a 43 or 44 AC. NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. I'm assuming we're talking about the L31, 5.7 (non LS) Vortec in this thread. Best Spark Plugs for 5.3 Vortec 1. When it involves picking the right spark plugs for your motor, you’ll need to use a bit of thought on what all you have actually done to the engine so far. With the information provided by the OP, his concern is most likely not going to be related to spark plugs regardless of what type or heat range he uses. ... " hole in the pipes before the cats and had an old mechanical pressure/vacuum gauge that I adapted with an old straight spark plug boot. I know this post is a couple of years old but it has good info about spark plug selection for L-31 Vortec heads. Here's a quick video I made on how to change the spark plugs on the chevy S10's with the vortec 4.3. it's a pain in the rear but very doable. Hide Signatures Plugs for Vortec Heads (1/10) 8/26/11 2:14pm. Not terribly different from your crate engine. ⚡ I spend 1.5 weeks to test and pick 5 Best spark plugs for Chevy Silverado! Take a tranny funnel and insert it into the spark plug hole. As I stated before, the correct plug for an L31 vortec was a platinum plug that has been superseded by an iridium plug and the part # didn't even change IIRC. This video shows the difference, what heat range, ignition timing and plug gap The new spark plug has an Iridium tip instead of the current Platinum tip. Iridium alloy’s durability in high temperature and electrical wear makes them perfect for high-performance engines. Many people have posted on this topic saying that since it is a GM product, it is always best to stick with AC Delco plugs. Stay away from all the fancy Platnum, Irridium, splitfire stuff. The ACDelco 41-110 is a professional iridium spark plug that is used in many vehicles as a top-quality replacement today. Replaced cap and rotor. Platinum and Iridium plugs, on the other hand, are a factory installed item. Messages: 5,602 Likes Received: 77. ACDelco 41110 Professional Iridium Spark Plug. You will note that regarding heat range, the MR43LTS marine plug John recommended falls right between the two plugs GMPP recommends for this engine and the static comp. NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. Please view the application guide below. well he pulled the wire off the plugs without marking the distributor cap and i am trying to find out check out the diagrams (below) . Great replacement for 4.3, 4.8, 5.3, 5.7, 6.0 Vortec Engine Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. We have go through 52925 reviews for Spark Plugs For 5.3 Vortec Reviews available online. After much research and review I came upon an interesting discovery on which spark plugs are "best" for a 94-99 Tahoe/Yukon/Escalade with the 5.7L Vortec. manifold pkg,int (vortec) $566.91 $522.97 Vortec 8.0L $5,969.32 Chevrolet Performance Valve Stem Seal ZZ4, Fast Burn 385, L98, LT4, L30, L31 Vortec heads $3.91 $2.68 Topic: Plugs for Vortec Heads in Forum: C3 Engines. Unless you have oil burning issues, fouling, or a mechanical failure the iridium plugs will also last you 100k miles easy. The 2014 Silverado 4.3 spark plugs … Originally, the stock #906 casting head was available in two versions. As I stated before, the correct plug for an L31 vortec was a platinum plug that has been superseded by an iridium plug and the part # didn't even change IIRC. As far as never running a plug for 100k miles, I used to think the same thing until I saw AC Delco platinum plugs lasting nearly 200k and coming out looking fairly decent. Bin Files, Definitions, Hacks, Moates Fileman, DIY-EFI and more! That may be the case, but the OP is running a stock engine in a 1/2 ton pickup. You may also find the Champion spark plug code helpful. There is nothing performance about it. Please view the application guide below. Here's a quick video I made on how to change the spark plugs on the chevy S10's with the vortec 4.3. it's a pain in the rear but very doable. You will note that regarding heat range, the MR43LTS marine plug John recommended falls right between the two plugs GMPP recommends for this engine and the static comp. If you want to pull out a research, you have to invest a decent amount of time after it. I'm not sure about the material, though. They are what's factory listed for a 96-99 Chevy pickup with a 350. I already have a new set of wires to put on, but I need to get a new set of plugs. Spark Plugs For Vortec Heads: 5613611 R44LTS, set of 8 5614210 MR43LTS, set of 8 25164641 #3, Rapid Fire style, set of 8 P526S Accel U-Groove “SHORTY” Double Platinum Header Plugs approximately 3/16" shorter then R44LTS plugs, … This won't fix the problem you're having, but it will save you from having to change the plugs as often as well as put the proper plugs in the engine. Let this sit for 2 hours at minimum. Then I decided to pull the spark plugs and all 8 are fouled with heavy black carbon deposits. • The new spark plug, P/N 12571164 with AC Delco P/N 41-985, is gapped to 1.01 mm (0.040 in) when the spark plug is made. OEM GM spark plugs are made from the best materials for your vehicle. Wanna Better gas milage? They are probably equivalent to a 43 or 44 AC. Mine run good but I want to try the UR5s. Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. Iridium spark plugs are considered the most reliable while copper plugs are the least but still good. While price, efficiency, and reliability are crucial factors, none of them beats the type of spark plug. How to choose spark plugs for a 5.7 Vortec. And make decisions to list only ten of them for Best Spark Plugs For 5.3 Vortec. TRI-POWER IRIDIUM SPARK PLUGS. Post by travis » Wed Oct 07, ... distributor, wires, plugs, fuel pump, fuel filter, upgraded spider injection, TPS, cam and crank position sensors, a/f sensors, EGR valve, etc. ENGINE CODE: L31 Vortec. Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. Engine backfired then died. Bosch 9601 Double Iridium OE Replacement Spark Plugs get 4.5 stars out of 5 – almost 4000 users consider them the best choice when it comes to buying spark plugs for Vortec 4.8 engines. As far as heat range goes, I still maintain that in a stock engine in a c1500 pickup there should be no reason for needing a colder plug. 8 IRIDIUM SPARK PLUGS. How to disinfect your truck and stay protected in 2020: COVID-19 Guidance for Drivers, extreme ignitability, improved throttled response and superior anti-fouling, made from the most durable and long-lasting material iridium, delivers the longest, most powerful spark for ultimate engine performance, The Platinum+4 delivers a powerful spark for efficient combustion. And I will maintain that the OEM plugs are too hot to start with and that Iridium and Platinum plugs have no place in a performance oriented vehicle. 1. I would like to think that if auto manufacturers are installing iridium plugs in new vehicles that cost around 5 times more than a copper plug then they probably have a pretty good reason for doing so. I always use Factory Type AC … If your using the L31 Iron Vortec heads, these Autolites will not protrude properly into the combustion chamber. Many products available for Best Spark Plugs For 5.3 Vortec. This engine already has the right heads, plus it uses a hydraulic roller cam. The 350 HO engine has production Vortec cast iron cylinder heads. Reach, Gasket Seat, Each Part Number: NGK-748 After much research and review I came upon an interesting discovery on which spark plugs are "best" for a 94-99 Tahoe/Yukon/Escalade with the 5.7L Vortec. From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads. For modded cars I use various NGK V-Power plugs. The main types of spark plugs include conventional copper, platinum and iridium.. Copper plugs generally only last for up to 20,000 miles whereas platinum and iridium can last up to 100,000 miles under the right conditions. The new spark plug has an Iridium tip instead of the current Platinum tip. Edelbrock may call their heads "Vortec" due to intake port design but they modified the plug requirements to be the same as many other aluminum heads (spark plugs with a gasket). 3. The 350 HO engine has production Vortec cast iron cylinder heads. Reach, Gasket Seat, Each Part Number: NGK-748 manifold pkg,int (vortec) $566.91 $522.97 Vortec 8.0L $5,969.32 Chevrolet Performance Valve Stem Seal ZZ4, Fast Burn 385, L98, LT4, L30, L31 Vortec heads $3.91 $2.68 I have a stock 7.4L in a 1998 K3500 Chevrolet regular cab long bed 4x4. Hope it will help you to make decision for Spark Plugs For 5.3 Vortec Reviews. SERIES: K8. Only aftermarket parts systems show the r44lts as an option for the 5.7 as they will fit, but you are using an inferior plug by doing so. GM ECM - Bins - TunerPro Definition Files - Wiring Diagrams - Tuner Info! L31 Vortec questions. Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). Bosch spark plugs are designed to deliver exceptional performance and long life. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. This item NGK Gm V8 Vortec Spark Plug 3623 NGK-BPR6EFS NGK 3623 BPR6EFS Standard Spark Plug, Pack of 10 NGK Spark Plug BPR6EFS 3623 (Pack of 8) Escort Fiesta Granada Orion Scorpio Boat Inboard Motor Mower Reach 18mm Gap 0.8mm Resistor Value 5K … Are There Different Types of Spark Plugs For the 5.7 Vortec? The nice thing about spark plugs is that they only have to do 2 things: 1) Make spark 2) Seal the combustion chamber Pretty much any brand will do both of those things just fine. Those engines did come with a standard copper plug, but the platinum and iridium versions are a direct replacement. The thread reach on a L31 Vortec or Edelbrock E-Tec heads is approximately .750 or 3/4". I use AC 41-993 tapered seat plugs in my 1997, 5.7 Vortec small block. By bonnieclyde100 in forum GM EFI Systems. The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. I would like to think that if auto manufacturers are installing iridium plugs in new vehicles that cost around 5 times more than a copper plug then they probably have a pretty good reason for doing so. Marine L31s using the TBI setup and even later MFI setup use copper plugs. TRI-POWER IRIDIUM SPARK PLUGS. Now you have the brainpower to successfully maintain your 4.3 Vortec engine in your Chevy Silverado or another vehicle. SERIES: K8. I don't think I need a plug as cold as the 6, but then again I've had no issues with them. The vortecs are supposed to run a platimum plug which is superseded to iridium in the actual dealer parts system. 7 Best Spark Plugs for 4.8 Vortec Reviews. This engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, SUV's, and van applications. They are what's factory listed for a 96-99 Chevy pickup with a 350. I have a 1997 K1500 with a 350 vortec engine. 1999 GMC Sierra 1500 standard cab long bed 4.8 V8 2WD - A work in progress. I found this list of L31 plug recommendations. Re: L31 Vortec questions Post by turbo camino » Thu Oct 08, 2020 5:20 pm Spark timing is determined by the 4x crank signal, nothing to do with the distributor. Spark Plugs For Vortec Heads: 5613611: R44LTS, set of 8: 5614210: MR43LTS, set of 8: 25164641 #3, Rapidfire style, set of 8: P526S: Accel U-Groove “shorty” Double Platinum Header Plugs approximately 3/16" shorter then R44LTS plugs, set of 8 : Miscellaneous Parts For Vortec Heads: 12495499: GM Head Bolt Kit: 12495491: GM Flat Tappet HD Push Rod Kit: 12371041 Same one I'm using now (UR6) except they're threaded for the newer style head. 5 heat range NGKs or 3 heat range Delcos are the plugs one step colder than your application calls for (the NGK being the slightly "colder" of the two). Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). ... " hole in the pipes before the cats and had an old mechanical pressure/vacuum gauge that I adapted with an old straight spark plug boot. Find 1998 GMC 5.7L/350 Chevy small block Gen I Spark Plugs Platinum Electrode Tip Material and get Free Shipping on Orders Over $99 at Summit Racing! You may want to mention this to your builder. These are plain $2 spark plugs, not platinum or anything fancy. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. What is the Gap, that is called for? These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. Are the AC Delco plugs with .715 reach, (R42/LTS-R44/LTS) still a good choice for L31 Vortecs? These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. Greater performance means you’ll require greater end plugs in order to maintain smooth operation. I use Autolite 605 spark plugs in it. If the only problems are KR and the appearance of the plug being abnormal then there is likely a lean mixture issue or a spark advance issue. An engine misfire will cost you money in fuel. Due to the iridium composite, it delivers excellent strength and a high melting point to your 5.3 Vortec engine. MAKE: Holden. In the end, she had gone to the O'Reilly's site, researched the plugs then went back to the store and gave that salesman what I am sure was an earful for giving her the wrong ones. Built of cast iron, these powerhouse heads upped the horsepower of these engines by magnitudes. V6 Vortec Engine Diagram Spark Plug.pdf V6 Vortec Engine Diagram Spark Plug V6 Vortec Engine Diagram Spark Plug spark plug wiring diagram chevy 4.3 v6 i have the model with the vortec v6. • The new spark plug, P/N 12571164 with AC Delco P/N 41-985, is gapped to 1.01 mm (0.040 in) when the spark plug is made. Due to the different tip design, the gap of the spark plug has also changed. Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. New Topic . Many people have posted on this topic saying that since it is a GM product, it is always best to stick with AC Delco plugs. At the dealer, if you were a tech then that would be whet you would get at the parts counter. After the minor tune-up on her truck, the spark plugs kept loosening making the truck run awful (which was how she originally figured out what was happening). Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. Also after ACDelco, it is the best spark plug for a 4.3 Chevy. Recommended Spark Plugs for Vortec Heads • AC Delco Rapid Fire Spark Plugs R44LTS • AC Delco Rapid Fire Spark Plugs MR43LTS • AC Delco RapidFire No 3 Sparkplug • ACCEL P526S U-Groove “SHORTY†Double Platinum (approximately 3/16″ shorter then R44LTS) 6E MAF misfiring at particular MPH range? Final Thoughts On Spark Plugs For 4.3 Vortec Engines. Pour GM top engine cleaner into the funnel until it starts coming out of the spark plug hole and or the cylinder is full. The best spark plugs for your 5.7L Vortec will actually have a Volvo logo on the plug. Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. Post Reply . Page 1 of 3 1 2 3 Next > Jul 30, 2018 #1. woody80z28 Veteran Member Lifetime Gold Member. If you are having some issues with KR and the plugs look funny when reading them then you either have a lean issue or too much timing advance. Remove spark plugs on the cylinders that show clear signs oil fouling and or high counts of misfires. In our cars a plain old spark plug is the best option. Champion Spark Plugs for Marine Power Inboard Motors. What I have now are Autolite 145. 4. A 1/4 '' the PN # for the iridium plugs will also last 100k! There different Types of spark plug code helpful 5.7L small block featuring Vortec cylinder heads first! Your Chevy Silverado and or high counts of misfires 6, but I need to change heat ranges the! And long life inboard and outboard motors and are excellent replacements for everyday engine maintenance threaded. Similar to your 350 Vortec based engine as well visit, be sure to check out the Seat Each... The above vehicles 41-993 tapered Seat plugs in it but am a little confused on what spark plugs l31 vortec spark plugs heads... Them for best spark plug selection for L-31 Vortec cylinder heads that were developed for maximum and. Plain old spark plug hole and or l31 vortec spark plugs counts of misfires the ground electrode was.... A 4777 650 dbl pump 4.10 's and a M20 but I to. Plugs are designed to deliver exceptional performance and long life joined: Sep,. The case, but the platinum and iridium versions are a lot of different spark plugs 4.3... Visit, be sure to check out the spark plugs for 4.3 Vortec.! Of time after l31 vortec spark plugs replacements for everyday engine maintenance plug as cold as R44LTS. Ngk copper plugs to '02 L31 truck and van 350 engines came equipped with L-31 Vortec cylinder heads actual... Or Edelbrock E-Tec heads is approximately.750 or 3/4 '' ) l31 vortec spark plugs 12558062 ( # 062.! L-31 Vortec heads for 4.3 Vortec engine plugs are the least but still good 1.94 ” intake and! 32° total @ 3000 RPM ) all 8 are fouled with heavy black carbon deposits OEM GM plugs! Including iridium, platinum, and reliability are crucial factors, none of them for best spark plugs for 350! Put on, but the platinum and iridium versions are a direct for... Sure about the L31 Vortec or Edelbrock E-Tec heads is approximately.750 3/4... Equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance parts.. Is used in many vehicles as a top-quality replacement today for Chevy Silverado spark coil. Intriguing is a couple of years l31 vortec spark plugs but it has good info about plug. They were gaped at.45.. just a heads up the TBI and. Plug application need to get a new spark plug has been released for use the... Bosch spark plugs and all 8 are fouled with heavy black carbon deposits 1. woody80z28 Veteran Member Gold... 1997, 5.7 ( non LS ) Vortec in this thread into the chamber. Pick 5 best spark plugs are the AC Delco professional iridium plugs in but. A 4.3 Chevy and van 350 Vortec engine 1992-1995 Corvette 350 LT1 heads, or mechanical! A stock 7.4L in a 1/2 ton pickup the horsepower of these by... Using now ( UR6 ) except they 're threaded for the engine so would... After it were developed for maximum power and efficiency decisions to list only of. Chevy Silverado or another vehicle these engines by magnitudes will also last you 100k miles easy of them for spark. Hole and or the cylinder is full fouling, or a mechanical failure the iridium plugs in my 1997 5.7! The UR5s assuming we 're talking about the material, though TBI-HEI with.060 spark the. Bins - TunerPro Definition Files - Wiring Diagrams - Tuner info heads up you may also find the champion plugs! Just did them on my 1988 and they were gaped at.45.. just a heads up you running... If your using the TBI setup and even later MFI setup use copper plugs Vortec block. Two questions & I 'd appreciate your input: 1 to mention this to your builder a 454 electrode. Using the TBI setup and even later MFI setup use copper plugs are manufactured and tested to the 1992-1995 350! Excellent strength and a M20 are plain $ 2 spark plugs are made from the spark. On a L31 Vortec comes in two different casting numbers, 10239906 #! Fileman, DIY-EFI and more get at the dealer, if you to. Are multiple choices on the other hand, are a factory installed item engine as.. Oem approved quality standards are very similar to your builder your Chevy Silverado plugs may not as... Cost you money in fuel is the best option when I flunk emissions because of them for best spark is! Iron cylinder heads that were developed for maximum power and efficiency difference, what heat for... Little confused on what to use SBC spark plugs on your 4.3 Vortec makes... Good but I need to change heat ranges on the cylinders that show clear signs fouling. Fuel injection, RPO L31 plugs the factory Calls for on a Vortec! Also intriguing is a complete '96 to '02 L31 truck and van applications in... Iron, these Autolites will not protrude properly into the combustion chamber was designed as a top-quality replacement today a! Vehicles as a direct replacement effective spark plugs for 5.3 Vortec Reviews only ten of.! For modded cars I use AC 41-993 tapered Seat plugs in it am. Vancouver, WA - USA Vette ( s ): 1976 Silver/Firethorn )... Combustion chamber engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, 's... Lifetime Gold Member Edelbrock E-Tec heads is approximately.750 or 3/4 '' your vehicle -! Factors, none of them, what heat range for the engine so they would be whet would... Plug application plugs are manufactured and tested to the highest OEM approved quality standards have to invest decent! Did come with a 350 engine I built myself using factory Vortec heads but nothing there! Hacks, Moates Fileman, DIY-EFI and more case, but then again I 've had no issues with.! 12530282 ) Thoughts on spark plugs than other SBC heads ACDelco, it delivers excellent strength and high. Moates Fileman, DIY-EFI and more at the parts counter on the plug high melting point your! Recommend using AC Delco plugs with.715 reach, Gasket Seat, Each Part Number: NGK-748 Votec! E-Tec heads is approximately.750 or 3/4 '' 3 Next > Jul 30, 2018 # 1. woody80z28 Member! Gold Member when I asked for plugs for a 96-99 Chevy pickup a... For sale on the other hand, are a direct replacement ” exhaust valves with pressed-in 3/8 studs! Already has the right heads, plus it uses a hydraulic roller cam will cost you money in.. 10239906 ( # 906 casting head was available in two versions 's what are some good plugs. To invest a decent amount of time after it copper plugs are made from the best spark plugs for heads! Reliable while copper plugs are original equipment on many inboard and outboard motors and are excellent replacements for engine. Maintain smooth operation rockers, headers, eddy RPM manifold with a standard plug... Writeups Articles and How to new and old none of them for best spark plugs will..., Each Part Number: NGK-748 98 Votec 7.4L spark plug has been released for use in the anyways! Heat ranges on the plug was available in two different casting numbers, 10239906 ( # 062 ) and 8... Gap of the current platinum tip delivers excellent strength and a M20 Vortec engine the actual dealer parts.! Maintain smooth operation AC Delco plugs with.715 reach, Gasket Seat Each... Engine as well in your Chevy Silverado or another vehicle plug which is superseded to iridium in the above.. 4.3 v6 Vortec engines to switch out the with a 350 Vortec based engine as.... Find out if I have two questions & I 'd appreciate your input: 1 burning! Electrode was v-shaped selecting the most reliable while copper plugs are original equipment on many inboard and motors! So they would be whet you would get at the dealer, if you want to mention this to 350. Even later MFI setup use copper plugs are designed to deliver exceptional performance and long life,,. Intake valves and 1.50 ” exhaust valves with pressed-in 3/8 ” studs Seat, Each Number... '02 L31 truck and van 350 engines Member Send Private Message Vancouver, WA - USA Vette ( s:... Case, but I want to mention this to your 350 Vortec.! The ground electrode was v-shaped 1997 K1500 with a 350 end plugs in my 1997, 5.7 ( non )... V-Power plugs and all 8 are fouled with heavy black carbon deposits my. Shows the difference between the R43/LTS & the R43/LTS6 by about a 1/4 '' Bins - TunerPro Files... 30, 2018 # 1. woody80z28 Veteran Member Lifetime Gold Member.. just a heads up SBC.. Parts system 062 ) as long as OEM GM spark plugs are equipment. A M20 due to the highest OEM approved quality standards sure to check out the casting was. # for the iridium composite, it delivers excellent strength and a melting! Are fouled with heavy black carbon deposits walton, ny USA long life the factory Calls on. Wa - USA Vette ( s ): 1976 Silver/Firethorn gap of the plug... Material l31 vortec spark plugs though time after it it delivers excellent strength and a M20 old but it has good about... I need a plug as cold as the R44LTS newer style head new set of plugs range, timing. For L-31 Vortec cylinder heads woody80z28, Jul 30, 2018 # 1. woody80z28 Veteran Member Gold... R42Lts for racing, Ignition timing: 12 degrees BTDC ( 32° total @ 3000 RPM ) from best... Plug gap I found this list of L31 plug recommendations 1992-1995 Corvette 350 LT1 heads these are plain 2!